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Stock Plans (Tables)
 12 Months Ended
Aug. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary Of Restricted Stock and Performance Shares Activity
A summary of restricted stock units and performance shares activity during fiscal 2021 is as follows:
Number of
Shares		Weighted-Average Fair  Value at Grant Date (Per Share)
Outstanding on August 31, 2020986,121 $24.10
Granted515,469 22.44
Forfeited(76,989)25.30
Vested(406,943)23.84
Outstanding on August 31, 20211,017,658 $23.27
Summary Stock option Activity
A summary of stock option activity during fiscal 2021 is as follows:
SharesWeighted-Average
Exercise Price
(Per Share)		Weighted-Average
Remaining Contractual
Term		Aggregate
Intrinsic Value
Outstanding on September 1, 20201,455,041 $26.45 
Granted— — 
Exercised(152,680)22.62 
Forfeited— — 
Expired(312,893)27.56 
Outstanding on August 31, 2021989,468 $26.69 3.6$1,013,960 
Exercisable on August 31, 2021926,343 $26.67 3.5$1,013,960 
Summary of Weighted Average Grant-Date Fair Value Of options, Total Intrinsic Value of Options Exercised, and Cash Receipts from Options Exercised A summary of the total intrinsic value of options exercised and cash receipts from options exercised is summarized below (in thousands, except per share amounts):
 Year Ended August 31,
 202120202019
Intrinsic value of options exercised$587 $803 $429 
Cash receipts from exercise of options2,208 2,631 1,404 
Weighted Average Assumptions As of August 31, 2021, there was $12.7 million of total unrecognized compensation cost related to share-based awards, including stock options, restricted stock, restricted stock units and performance shares, which will be recognized over a weighted average period of 1.8 years. The total fair value of share-based awards that vested during the fiscal years ended August 31, 2021 and 2020 was $9.7 million and $18.2 million, respectively.